the fastest way would be to buy them
Otherwise signature campaigns seem to be a way to earn.
But the rank needs time.
So, there is no fast and safe way to earn bitcoins. Otherwise everybody would do that.
I think while you have a large capital you can earn money quickly certainly problems rank on your account you can get around it by buying account. yeah I say that capital is very important and helpful besides that many methods such as trade or binaries that need capital where you can earn money fast there